From f8673fd5700257576b23e0f6de71c153bac23978 Mon Sep 17 00:00:00 2001
From: Ashok Reddy Soma <ashok.reddy.soma@xilinx.com>
Date: Mon, 22 May 2023 16:59:49 +0200
Subject: arm64: zynqmp: Fix usb node drive strength and slew rate
As per design, all input/rx pins should have fast slew rate and 12mA
drive strength. Rest all pins should be slow slew rate and 4mA drive
strength. Fix usb nodes as per this and remove setting of slow slew rate
for all the usb group pins.
Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/379071f44ceb27a0e32d74e13221640922d989d1.1684767562.git.michal.simek@amd.com
---
arch/arm64/boot/dts/xilinx/zynqmp-zcu104-revC.dts | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
(limited to 'arch/arm64/boot/dts/xilinx/zynqmp-zcu104-revC.dts')
diff --git a/arch/arm64/boot/dts/xilinx/zynqmp-zcu104-revC.dts b/arch/arm64/boot/dts/xilinx/zynqmp-zcu104-revC.dts
index 4f6429caecff..954044d9899f 100644
--- a/arch/arm64/boot/dts/xilinx/zynqmp-zcu104-revC.dts
+++ b/arch/arm64/boot/dts/xilinx/zynqmp-zcu104-revC.dts
@@ -422,20 +422,22 @@
conf {
groups = "usb0_0_grp";
- slew-rate = <SLEW_RATE_SLOW>;
power-source = <IO_STANDARD_LVCMOS18>;
- drive-strength = <12>;
};
conf-rx {
pins = "MIO52", "MIO53", "MIO55";
bias-high-impedance;
+ drive-strength = <12>;
+ slew-rate = <SLEW_RATE_FAST>;
};
conf-tx {
pins = "MIO54", "MIO56", "MIO57", "MIO58", "MIO59",
"MIO60", "MIO61", "MIO62", "MIO63";
bias-disable;
+ drive-strength = <4>;
+ slew-rate = <SLEW_RATE_SLOW>;
};
};
};
--
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